Adam, I., Young, B. A., Nicol, A. M. & Degen, A. A. (1984). Energy cost of eating in cattle given diets of different form. Animal Production 38, 53–56.Google Scholar

Agricultural Research Council (1965). The Nutrient Requirements of Farm Livestock. No. 2, Ruminants. London: H.M. Stationery Office.Google Scholar

Agricultural Research Council (1980). The Nutrient Requirements of Ruminant Livestock. Slough: Common wealth Agricultural Bureaux.Google Scholar

Armstrong, D. G. & Blaxter, K. L. (1957 a). The heat increment of steam volatile fatty acids in fasting sheep. British Journal of Nutrition 11, 247–272.CrossRefGoogle ScholarPubMed

Armstrong, D. G. & Blaxter, K. L. (1957 b). The utilization of acetic, propionic and butyric acids by fattening sheep. British Journal of Nutrition 11, 413–425.CrossRefGoogle ScholarPubMed

Armstrong, D. G., Blaxter, K. L. & Graham, N. McC. (1957). The heat increment of mixtures of steam volatile fatty acids in fasting sheep. British Journal of Nutrition 11, 392–408.CrossRefGoogle ScholarPubMed

Armstrong, D. G., Blaxter, K. L., Graham, N. McC. & Wainman, F. W. (1958). The utilization of the energy of two mixtures of steam volatile fatty acids by fattening sheep. British Journal of Nutrition 12, 177–188.CrossRefGoogle ScholarPubMed

Baker, F. (1942). Microbial factors in the digestive assimilation of starch and cellulose in herbivora. Nature 150, 479.CrossRefGoogle Scholar

Barcroft, J., McAnally, R. A. & Phillipson, A. T. (1944). Absorption of acetic, propionic and butyric acids from the alimentary canal. Biochemical Journal 38, iii.Google Scholar

Bassett, J. M. (1974). Diurnal patterns of plasma insulin, growth hormone, corticosteroid and metabolite concentrations in fed and fasted sheep. Australian Journal of Biological Science 27, 167–181.CrossRefGoogle ScholarPubMed

Blaxter, K. L. (1962). The Energy Metabolism of Ruminants. London: Hutchinson.Google Scholar

Bull, L. S., Reid, J. T. & Johnson, D. R. (1970). Energetics of sheep concerned with the utilization of acetic acid. Journal of Nutrition 100, 262–276.CrossRefGoogle ScholarPubMed

Burrin, D. G., Ferrell, C. L. & Britton, R. A. (1989). Effect of feed intake of lambs on visceral organ growth and metabolism. In Proceedings of the 11th Symposium on Energy Metabolism. European Association of Animal Production Publication no. 43, pp. 103–106 [van der Honing, Y. and Close, W. H., editors]. Wageningen, The Netherlands: Pudoc.Google Scholar

Crabtree, B., Barr, S. A.. Anderson, S. E. & MacRae, J. C. (1987). Measurement of the rate of substrate cycling between acetate and acetyl-CoA in sheep muscle in vivo: effects of infusion of acetate. Biochemical Journal 243, 821–827.CrossRefGoogle ScholarPubMed

Eskeland, B., Pfander, W. H. & Preston, R. L. (1973). Utilization of volatile fatty acids and glucose for protein deposition in lambs. British Journal of Nutrition 29, 347–355.CrossRefGoogle ScholarPubMed

Flatt, W. P., Moe, P. W., Moore, L. A., Hooven, N. W., Lehman, R. P., Ørskov, E. R. & Hemken, R. W. (1967). Experimental design, ration composition, digestibility data and animal performance during energy balance trials. In Proceedings 4th Conference on Energy Metabolism. European Association of Animal Production Publication no. 12, pp. 221–234 [Blaxter, K. L., Kielaowski, J. and Thorbek, C. editors]. Newcastle upon Tyne: Oriel Press Ltd.Google Scholar

Gadeken, D., Breves, G. & Oslage, H. J. (1989). Efficiency of energy utilization of intracaecally infused volatile fatty acids in pigs. In Proceedings of the 11th Symposium on Energy Metabolism. European Association of Animal Production Publication no. 43, pp. 115–118 [van der Honing, Y. and Close, W. H., editors]. Wageningen, The Netherlands: Pudoc.Google Scholar

Gill, M., Cammell, S. B., Haines, M. J., France, J. & Dhamoa, M. S. (1989). Energy balance in cattle offered a forage diet at sub-maintenance levels. In Proceedings of the 11th Symposium on Energy Metabolism. European Association of Animal Production Publication no. 43, pp. 300–303 [van der Honing, Y. and Close, W. H. editors]. Wageningen, The Netherlands: Pudoc.Google Scholar

Graham, N. McC. (1986). Energetic efficiency and amino acid supply in ruminants. British Journal of Nutrition 56, 315.Google ScholarPubMed

Holmes, C. W., MacLean, N. A. & Lockyer, K. J. (1978). Changes in the rate of heat production of calves during grazing and eating. New Zealand Journal of Agricultural Research 21, 107–112.CrossRefGoogle Scholar

Hovell, F. D. DeB., Greenhalgh, J. F. D. & Wainman, F. G. (1976). The utilization of diets containing acetate salts by growing lambs as measured by comparative slaughter and respiration calorimetry, together with rumen fermentation. Brirish Journal of Nutrition 35, 343–363.CrossRefGoogle ScholarPubMed

Hungate, R. E. (1966). The Rumen and its Microbes. New York: Academic Press.Google Scholar

Jenkins, T. C. & Thonney, M. L. (1988). Effect of propionate level in a volatile fatty acid salt mixture fed to lambs on weight gain, body composition and plasma metabolites. Journal of Animal Science 66, 1028–1035.CrossRefGoogle Scholar

Kellner, O. (1926). The Scientific Feeding of Animals. London: Duckworth.Google Scholar

Koong, L. J., Ferrell, C. L. & Nienaber, J. A. (1985). Assessment of interrelationships among levels of intake and production, organ size and fasting heat production in growing animals. Journal of Nutrition 115, 1383–1390.CrossRefGoogle ScholarPubMed

KuVera, J. C., MacLeod, N. A. & Ørskov, E. R. (1989). Energy exchanges of cattle nourished by intragastric infusion of nutrients. In Proceedings of the 11th Symposium on Energy Metabolism. European Association of Animal Production Publication no. 43, pp. 271–274 [van der Honing, Y. and Close, W. H., editors]. Wageningen, The Netherlands: Pudoc.Google Scholar

KuVera, J. C., Ørskov, E. R., Hovell, F. D. DeB. & MacLeod, N. A. (1987). Effect of small amounts of glucose and different volatile fatty acid mixtures on fasting N excretion in lambs. 5th International Symposium on Protein Metabolism and Nutrition. European Association of Animal Production Publication no. 35, p. 94 [Poppe, S., editor]. Rostock, DDR: Wissenschaftliche Zeitschrift der Wilhelm-Pieck Universitat Rostock.Google Scholar

McClymont, G. L. (1952). Specific dynamic actions of acetic acid and heat increment of feeding in ruminants. Australian Journal of Scientific Research 5B, 374.Google Scholar

MacLeod, M. G., Jewitt, T. S. & Anderson, J. E. M. (1989). Responses of energy expenditure and retention to wide-ranging dietary concentrations and voluntary intakes of energy and protein in growing domestic fowl. In Proceedings of the 11th Symposium on Energy Metabolism. European Association of Animal Production Publication no. 43, pp. 195–199. Wageningen, The Netherlands: Pudoc.Google Scholar

MacLeod, N. A., Corrigall, W., Stirton, R. A. & Ørskov, E. R. (1982). Intragastric infusion of nutrients in cattle. British Journal of Nutrition 47, 547–552.CrossRefGoogle ScholarPubMed

MacLeod, N. A. & Ørskov, E. R. (1984). Absorption and utilization of volatile fatty acids in ruminants. Canadian Journal of Animal Science 64, Suppl., 354–355.CrossRefGoogle Scholar

Marston, H. R. (1948). Energy transactions in the sheep. 1. The basal heat production and heat increment. Australian Journal of Scientific Research 1B, 95–123.Google Scholar

Morton, J. C. (1855). A Cyclopaedia of Agriculture. London: Blackie & Son.Google Scholar

Mulier, H. L., Kirchgeszner, M. & Roth, F. X. (1989). Energy utilization of intracaecally infused carbohydrates and casein in sows. In Proceedings of the 11th Symposium on Energy Metabolism. European Association of Animal Producrtion Publication no. 43. pp. 123–126 [van der Honing, Y. and Close, W. H. editors]. Wageningen, The Netherlands: Pudoc.Google Scholar

Ørskov, E. R. (1982). Effect of volatile fatty acid composition and protein on energy utilization and milk composition on cows sustained by intragastric nutrition. In Energy Metabolism of Farm Animals. pp. 123–126 [Ekern, A. and Sundstøl, F., editors]. Aas: Agricultural University of Norway.Google Scholar

Ørskov, E. R. & Allen, D. M. (1966 a). Utilization of salts of volatile fatty acids by growing sheep. 1. Acetate, propionate and butyrate as sources of energy for young growing lambs. British Journal of Nutrition 20, 295–305.CrossRefGoogle Scholar

Ørskov, E. R. & Allen, D. M. (1966 b). Utilization of salts of volatile fatty acids by growing sheep. 2. Effect of stage of maturity and hormone implantation on the utilization of volatile fatty acid salts as sources of energy for growth and fattening. British Journal of Nutrition 20, 509–517.CrossRefGoogle Scholar

Ørskov, E. R. & Allen, D. M. (1966 c). Utilization of salts of volatile fatty acids by growing sheep. 4. Effects of type of rumen fermentation of the basal diet on the utilization of salts of volatile fatty acids for nitrogen retention and body gains. British Journal of Nutrition 20, 519–532.CrossRefGoogle Scholar

Ørskov, E. R., Flatt, W. P. & Moe, P. W. (1968). A fermentation balance approach to estimate extent of fermentation and efficiency of volatile fatty acid formation in ruminants. Journal of Dairy Science 51, 1429–1435.CrossRefGoogle Scholar

Ørskov, E. R., Flatt, W. P., Moe, P. W., Munson, A. W., Henken, R. W. & Katz, I. (1969). The influence of ruminal infusion of volatile fatty acids on milk yield and composition and energy utilization by lactating cows. British Journal of Nutrition 23, 443–453.CrossRefGoogle Scholar

Ørskov, E. R., Fraser, C. & Gordon, J. G. (1974). Effect of processing of cereals on rumen fermentation, digestibility, rumination time and firmness of subcutaneous fat. British Journal of Nutrition 32, 59–69.CrossRefGoogle Scholar

Ørskov, E. R., Grubb, D. A., Wenham, W. & Corrigall, W. (1979). The sustenance of growing and fattening ruminants by intragastric infusion of volatile fatty acids and protein. British Journal of Nutrition 41, 553–558.CrossRefGoogle Scholar

Ørskov, E. R., Hovell, F. D. DeB. & Allen, D. M. (1966). Utilization of salts of volatile fatty acids by growing sheep. 2. Effect of stage of maturity and hormone implantation on the utilization of volatile fatty acid salts as sources of energy for growth and fattening. British Journal of Nutrition 20, 307–315.Google Scholar

Ørskov, E. R. & Oltjen, R. R. (1967). Influence of carbohydrate and nitrogen sources on the rumen volatile fatty acids and ethanol of cattle fed purified diets. Journal of Nutrition 93, 222–228.CrossRefGoogle Scholar

Ortigues, I., Smith, T., Oldham, J. D. & Gill, M. (1989). The effects of fishmeal on growth and calorimetric efficiency in heifers offered straw-based diets. In Proceedings of the 11th Symposium on Energy Metabolism. European Association of Animal Production Publication no. 43. pp. 65–68 [van der Honing, Y. and Close, W. H., editors]. Wageningen, The Netherlands: Pudoc.Google Scholar

Tyler, C. (1975). Albrecht Thaer's hay equivalents: fact or fiction? Nutrition Abstracts and Review 45, 1–11.Google Scholar

Tyrrell, H. F., Reynolds, P. J. & Moe, P. W. (1979). Effect of diet on patial efficicncy of acetate use for body tissue synthesis by mature cattle. Journal of Animal Science 48, 598–606.CrossRefGoogle Scholar

Webster, A. J. F., Brockway, J. M. & Smith, J. S. (1974). Prediction of the energy requirements for growth in beef cattle. 1. The irrelevance of fasting metabolism. Animal Production 19, 127–140.Google Scholar